(Obs.) Of or fit for comedy
So clearly untrue or unreasonable as to be laughable or ridiculous
(Informal) Somewhat ill, painful, or abnormal:
The definition of hilarious is someone or something that is very, very funny.
Of inestimable worth; invaluable.
Find another word for sidesplitting. In this page you can discover 9 synonyms, antonyms, idiomatic expressions, and related words for sidesplitting, like: laughable, comical, absurd, funny, hilarious, priceless, killing, rich and laughter.